Glazier tool

ABSTRACT

A power tool for removing glazing compound in preparation for deglazing and reglazing sashes and the like, comprising a side mill spindled in adjustable relation with a co-acting combination chisel blade for cleaning up the milled surface and depth gauge for setting the milling cut depth; the spindle is adapted for driving by a portable drill; a stabilizing handle, quick change structure for left- and right-hand operation, and special cutting tools are provided.

llnite States Patent Tackett et a1. 1 1 Oct. 30, 1973 GLAZIER TOOL 2,452,818 11/1948 Williams 911 12 R 2,949,826 8/1960 Weber 90/12 R [76] lnvemmsl Tack", 3,274,889 9/1966 Ferris 90 12 R Elizabeth Broscott, Alamogordo, N. Primary Examiner-Donald G Kelly 22 il 6, 1971 Assistant Examiner-Howard N. Goldberg Attorney john F. McClellan, Sr. [21] Appl. No.: 204,991

[57] ABSTRACT [52] US. Cl 90/12 R, 30/293, 30/500, A power tool for removing glazing compound in prep- 144/136 C aration for deglazing and reglazing sashes and the like, [51] Int. Cl. 1323c l/20, B270 5/10 comprising a side mill spindled in adjustable relation [58] Field of Search 7/l4.l R, 14.1 A; with a co-acting combination chisel blade for cleaning 90/12 R, 12 D; 30/293, 123 R, 289, 500; up the milled surface and depth gauge for setting the 145/4, 401; 144/134 D, 136 C milling cut depth; the spindle is adapted for driving by a portable drill; a stabilizing handle, quick change [56] References Cited structure for leftand right-hand operation, and spe- UNITED STATES PATENTS cial cutting tools are provided.

1,268,215 6/1918 Casey 90/12 R 7 Claims, 10 Drawing Figures PAIENIEDmII 30 I973 SHEET l3? 3 EDD TACKETT MARY ELIZABETH BROSCOFF INVENTORS %fiih MGMM x311.

ATTORNEY PAIENTEDUBTBO'ISB 3.768.363

qt p r' 2 SASH EDD TACKETT MARY ELIZABETH BROSCOFF lNVENTORS BY mama gel.

ATTORNEY PAIENTED um 3 0 1975 SHEET 30F 3 FIG.6

MARY ELIZABETH BROSCOFF EDD TACKETT INVENTORS ATTORNEY GLAZIER TOOL This invention relates generally to milling devices and specifically to portable deglazing tools.

Deglazing is an economically important operation for several reasons. Included among these are: preparation for re-glazing as protection from injury, weather, intrusion, etc., salvaging of large pieces of glass and of special pieces such as stained glass or lettered glass, and salvaging of sash and the like. Probably the single most important overall economic factor in deglazing, however, is the labor cost, regardless of reasons for the operation'.

In replacing glass, deglazing usually takes far longer than installation of new glass. This makes glass replacement expensive, even where only one piece is involved, not to mention replacements required by large scale vandalism. V

The quality of the work done in deglazing also influences the time required to install new glass, and the sealing tightness. Smooth, uniform removal of sealing compound promotes new glass installation whereas rough splintered surfaces left on deglazing prevent ready fits and tight seals.

When salvaging, breakage of the pieces removed is to be avoided, as well as breakage of adjacent panes and of panes which are parallel-spaced as in double glazed greenhouses, for obvious economic reasons. Accidental breakage is to be avoided also for reasons of safety, especially in non-professional operations such as most household glass replacements, in which safety masks and protective clothing are not alwaysused.

In the prior art many different deviceshave been proposed to replace the hazardous, uncertain, slow, hammer-and-chisel technique most often employed. Among these devices have been automatic chisels opcrating on the jack-hammer principle, circular saws, end mills, and side mills, usually with special guides to adapt them for removal of putty from sashes with some degree of control. I

Many of the devices have included tracks to be secured to sashes to be deglazed, controlling clamps and cranks to move the deglazing tool along racks integral with the tracks, making the devices cumbersome, difficult to align, and expensive. Other devices .have included integral motors onhand-held frames mounting uncompensated cutters, making the devices relatively expensive and difficult to control.

It is primary purpose of the present invention to provide a device which overcomes almost all the prior-art objections in that it removes glazing compound, speedily, accurately, and safely, leaving a smooth-chiseled,

uniform surface for reglazing. Further objects are to provide a deglazing tool as described which is economical to buy, simple to-use, compact, lightweight, durable, easily adjusted, adapted for horizontal and vertical tion;

FIG. 5 is a detail showing reversible chisel structure; I

FIG. 6 shows in plan in partial section an embodiment having a gear drive; a

FIG. 7 is a section of a novel general-purpose milling cutter especially adapted for use with the invention;

FIG. 8 is an end view of a cutter;

FIG. 9 is a section of a special-purpose cutter for use with the invention; and

FIG. 10 a, b, and c are diagrams of various special shapes of cutters which can be used with the invention to solve various glazing problems.

' In the drawings, which are now referred to in detail, similar numerals indicate similar parts.

FIGS. 1 and 2 show aspects of anembodiment 10 of the invention, in plan in partial section, and in end detail, respectively.

Frame 16 rotatively mounts side-milling cutter 18, having teeth 72, on spindle 20. The'spindle extends beyond the frame in the opposite direction, as shank 22, adapting the device for being driven by an external power source such as a power drill, not shown but indicated in phantom lines by chuck C.

Chisel 24 is adjustably affixed to frame 16, with the cutting edge 26 of the chisel set near the periphery of cutter 18 for the special purpose of this invention. The chisel preferably extends slightly past the tangent point of the cutter, to prevent accidental snagging.

The adjustable setting of the angle of the chisel edge 26 with respect to the periphery of the side mill 18 is preferably through the clamping arrangement shown. Chisel 24 has a division 28 at the end opposite cutting edge 26. The division connects with a bore 30 which in turn receives a circular shaft 32 passed through frame 16 and fixedto it by a pin 34. The chisel is clamped to the shaft 32 by screw 36 which passes through clearance hole 38 in the upper half 40 of the split end of the chisel and'engages threaded hole 4.2 coaxially disposed in the lower half 44 of the split end of thechisel. The lower part of the chisel has'a substantially flat face 66.

h The width of the chisel is such that the outer face 68 protrudes slightly beyond the outer edge of the milling cutter 18 in plan view.

Fixed shaft 32 protrudes in the opposite direction from the frame 16 substantially parallel with, spindle shank 22. Handle 46 is mounted to the fixed shaft by means of a clamping screw 48 in the end of the handle which draws together the halves of split end 50 of the handle.

'54 when driven. n is.held axially by thrust collar 56, which may be integral with the shank, and by screw 58' which retains cutter 18. Key 60 locks the cutter to the shaft by engaging respective keyways 62 and 64.

FIG. 2 indicates the preferred direction of rotation by the arrow. As the milling cutter ll8 revolves, it mills away the putty and at the same time drags after it the chisel 26.

Edge 26 of the chisel cuts both directly as a separating edge, and in shear as a longitudinally vibrated knife, leaving behind it a clean, smooth, uniform cut. The edge and side of the chisel co-act with the mill in the several ways noted below, during operation of the invention.

FIG. 3, a perspective view of the invention in use, and FIG. 4, a sectional detail in elevation of the cutting operation, indicate other co-acting functions performed by the chisel.

First, bite of the chisel into the material cut prevents the rotating milling cutter from climbing out of the cut, thus making control of the instrument very easy and secure.

Second, the bearing of the flat face 66 of the chisel on the work limits the depth of cut of the milling cutter to that desired. This is particularly important if the cutter rotation is reversed, as it is then not climb-milling and tends to dig in more. Third, the outer face 68 of the chisel serves as an edge guide, riding on the glass, or on the sash if no glass is present, preventing breakage or gouging by the milling cutter in the axial direction. This contact also keeps the instrument square with the direction of travel, preventing it from tilting and running out of the work axially.

Most glazing is done from the exterior side of windows. Even though it may not be convenient for the user to erect a scaffold or a ladder, because of the lightness and stability of the instrument disclosed here and the adjustability of the handle, it is possible to reach through and deglaze from inside a raised window.

Further details of construction of the device are relatively conventional except for one feature shown. The cutter is bevelled on the outside edge 70 so that the teeth 72 are more easily prevented from digging into adjacent work.

FIG. 5 is a plan view of a reversible chisel 524 installed on the invention. With modern SCR controlled power tools which are commonly available with portable hand drills of every make, reversal of rotation requires simply flipping a switch. This makes it equally feasible to cut either from right to left or from left to right with the invention herein disclosed, provided that the chisel is removed and reversed on the fixed shaft. A symmetrical chisel 524 is provided for the purpose, as shown. The fixed shaft 532 can be slightly longer as shown than in the previous embodiment to facilitate mounting the split symmetrical end of the chisel. This reversible chisel provision makes it easy to clear away compound from all corners of the work equally, leaving only a slight radius or fillet retaining the glass at each corner. The last operation in removing the glass is to run a knife blade, a pick, or a small chisel blade into the four corners, freeing the glass to drop out.

FIG. 6 shows in partial section an embodiment 600 of the device which can be used to provide oppositedirection rotation to that of the first disclosed embodiment and speed change, if desired. The two'embodiments can be used in alteration if opposite-direction cutting is required and a reversing motor is not available. In this embodiment a counter shaft 674 is rotatively mounted in the frame in similar manner to the spindle 620, and is geared to it through spur gears 676, 678 on the respective shafts. If a one-to-one speed ratio is desired, equal diameter gears are used at 676 and 678. Access for gear changing is through a snap-in cover plate 692.

Glazing compound can vary in consistency from soft and tacky to rock hard; local variations tend to cause difficulty with some cutters.

FIGS. 7 and 8 show a special cutter 718 particularly adapted for use with the invention in removing glazing compounds. Each row of teeth is composed of alternately straight and bent teeth 772, 773 respectively, so that the teeth tend to overlap the spaces betwen the rows. The rows of teeth are formed on separate discs 775, 777, 779, 781, with respective spacers 783, 785, 787 between them. Each disc has a keyway slot in it and when these are aligned as shown, forming keyway 762, the teeth are staggered from row to row as shown in FIG. 8. This arrangement makes for a smooth cut and easy tooth clearing and replacement.

FIG. 9 shows a cupped tool 918, also of laminated construction, for getting in very close to the work. The steadiness of this invention allows the use of such a tool in a hand held device. In all the Figures the chisel edges and the milling tools are preferably of high speed toolsteel. The spacers may be of semi-hard rubber, providing elasticity especially suited for absorbing shock in hand milling operations of this nature. In the FIG. 9 embodiment a snap ring 990 recessed in cupped washer 991 may be used to locate the shank end of the tool on the spindle. The other reference numerals in FIG. 9 denote structure which is analogous to the structure referenced by similar numerals in FIG. 7.

FIG. 10 at a, b, and 0 shows three special-profile deglazing tools which may be used to conform to, or to produce, special beads in glazing and in deglazing oper ations. The FIG. 10 a toroidal tool will produce a rounded trough, the FIG. 10 b concave semi-cylindrical tool will produce a rounded bead, and the FIG. 10 c truncated cone shaped tool will produce a 45-degree bevel, or other straight bevel depending on the cone angle.

Obviously, many modifications and variations of the present invention are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims the invention may be practiced otherwise than as specifically described.

What is claimed and desired to be secured by United States Letters Patent is: j

1. A glazier tool comprising: means including a milling cutter having a spindle affixed thereto for removing glazing compound by rotary side milling; means for removing residual glazing compound by chiseling following said rotary side milling, including a chisel having a cutting edge substantially co-extensive in length with the milling cutter; means, including a frame having a bearing for the milling cutter spindle, for holding the chisel; aligned in a plane passing near the periphery of the milling cutter; means, including adjustable attachment of the chisel to the frame, for adjusting the alignment between the milling cutter and the chisel; said milling cutter spindle having a protrusion from the frame, thereby providing for the glazier tool to be connected to a rotary power source; fixed shaftlike structure provided integral with the frame and substantially parallel with the spindle; the chisel being clamped to one portion of the shaftlike structure, thereby comprising said adjustable attachment of the chisel to the frame; and a handle adjustably clamped to another portion of the fixed shaftlike structure in spaced relation with said spindle protrusion, thereby providing fro the glazier tool to be guided by one hand of the user and for said a rotary power source'connected to the spindle protrusion to be supported by the other hand of the user.

2. A glazier tool as recited in claim 1, wherein the fixed shaftlike structure comprises a shaft; the frame having an opening therethrough in spaced parallel relation with the spindle, and the shaft being fixed in said opening.

3. A glazier tool as recited in claim 1, wherein the chisel is a longitudinally symmetrical elongate member having the cutting edge transversely disposed at one end and having a reversible attachment to the frame at the other end, thereby adapting the glazier tool for both left-hand and right-hand cutting depending on the attachment of the chisel to the frame.

4. A glazier tool as recited in claim 1, wherein the milling cutter comprises a succession of co-axial, toothed-perimeter cutting members spaced apart by resilient members.

5. A glazier tool as recited in claim 4, wherein plural of the cutting members have keyways for attachment to a spindle, and wherein the keyways are staggered with respect to the teeth.

6. A glazier tool as recited in claim 4, wherein alternate teeth of a said member are laterally bent.

7. A glazier tool as recited in claim 4, wherein each cutting member is in the shape of a truncated cone. 

1. A glazier tool comprising: means including a milling cutter having a spindle affixed thereto for removing glazing compound by rotary side milling; means for removing residual glazing compound by chiseling following said rotary side milling, including a chisel having a cutting edge substantially co-extensive in length with the milling cutter; means, including a frame having a bearing for the milling cutter spindle, for holding the chisel; aligned in a plane passing near the periphery of the milling cutter; means, including adjustable attachment of the chisel to the frame, for adjusting the alignment between the milling cutter and the chisel; said milling cutter spindle having a protrusion from the frame, thereby providing for the glazier tool to be connected to a rotary power source; fixed shaftlike structure provided integral with the frame and substantially parallel with the spindle; the chisel being clamped to one portion of the shaftlike structure, thereby comprising said adjustable attachment of the chisel to the frame; and a handle adjustably clamped to another portion of the fixed shaftlike structure in spaced relation with said spindle protrusion, thereby providing for the glazier tool to be guided by one hand of the user and for said a rotary power source connected to the spindle protrusion to be supported by the other hand of the user.
 2. A glazier tool as recited in claim 1, wherein the fixed shaftlike structure comprises a shaft; the frame having an opening therethrough in spaced parallel relation with the spindle, and the shaft being fixed in said opening.
 3. A glazier tool as recited in claim 1, wherein the chisel is a longitudinally symmetrical elongate member having the cutting edge transversely disposed at one end and having a reversible attachment to the frame at the other end, thereby adapting the glazier tool for both left-hand and right-hand cutting depending on the attachment of the chisel to the frame.
 4. A glazier tool as recited in claim 1, wherein the milling cutter comprises a succession of co-axial, toothed-perimeter cutting members spaced apart by resilient members.
 5. A glazier tool as recited in claim 4, wherein plural of the cutting members have keyways for attachment to a spindle, and wherein the keyways are staggered with respect to the teeth.
 6. A glazier tool as recited in claim 4, wherein alternate teeTh of a said member are laterally bent.
 7. A glazier tool as recited in claim 4, wherein each cutting member is in the shape of a truncated cone. 